Charles wales



C. WALES. CALCULATING MACHINE. APPucmou' mio June 12. |911.

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H TS-SHE Patented May 6, 1919.

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CALCULATING MACHINE.

APPLICATION FILED JUNE r2, |911.

Patented May 6, 1919.

2 SHEETS-SHEET 2 1 "M Anon/vnf UNITED sTATEs PATENT oEEicE. l

CHARLES WALES, OF NEW HAVEN, CONNECTICUT, ASSIGNOR, BY MESN E ASSIGNMENTS, TO THE FEDERAL ADDING MACHINE CORPORATION, OF EAST ORANGE, NEW JERSEY,

, A. CORPORATION 0F NEW JERSEY.

CALCULATING-MACHINE.

Specicaton of Letters Patent.

Patented May 6, 1919.

To all 'lc/1,0m 'it may concern:

Be it known that I, CHARLES WALES, a citizen of the United States, residing at New Haven, county of New Haven, State of Connecticut, have invented a certain new and useful Improvement in Calculating-Machines, of which the following is a full, clear, and exact description.

My invention relates to motor driven calculating machines, and has for its obj ecp to produce from a continuously rotating shaft reciprocating movements such as are neces sary for operating the ordinary calculating machine. It also hasfor its object to provide a new and improved means for operating a calculating machine by a continuously running electric motor without the use of a clutch.

As the speed 'ofelectric motors, which are most commonly used for operating powerdriven calculating machines, is very high, it has been customary to reduce the speed by worm gearing. It has also been customary to employ a clutch between the motor and the reciprocating' device. These clutches have been the source of a great deal of trouble, because subjected to wear and disorder, and have been expensive to build. On these accounts one of the .principal ob` jects of my invention is to do away with such clutches. g

The following is a description of my invention, reference being had to the accompanying drawings, .in which: Figure 1 is a side elevation of a machine embodying my invention. the parts being in section;

Fig.'2 is a front elevation of the same on an enlarged scale, with parts in section on the line 2-2 of Fig. 1;

Fig. 3 is a sectional detail of a connecting rod; and A Figs. 4 and 5 are' perspective details show ing how the hand-operating handle is attached so as to be movable as wel] as removable.

Referring more particularly to the drawings, 1 is the base of the machine carrying .the side frames 2-3 for the calculating mechanism and keyboard. 4 is .the main shaft to which the operating handle 5 is connected for manual operation. 6 is a highspeed electric motor mounted on an eXtension of the base 1 and provided with a power shaft 7. 8 is a continuation of the shaft 7, bemgflexibly connected thereto by a flexible coupling 9. This lexibleshaft, at a point near its forward end, is journaled in a bear-y 1ng 10, carried by a lever 11, which is pivoted at 12 to a support on the left hand side ofthe machine. At a point beyond the bearing 11 the shaft 8 is provided with a worm 13, splined thereon by a spline 13 so as to rotate therewith but have a longitudinal movement relative thereto. Springs 14 connect this worm to a fixed collar l5 having a rearwardly extending sleeve 15 on the extreme end of the shaft, so as to tend to draw the worm forward. Beneath the worm is a worm gear 16 mounted on a shaft 17, supported by bearings 18-18, and provided with a wrist pin 19 on which is a connecting rod 20, whose other end is connected tov a rod 21 passing through crank arms 22--22l on the main shaft 4. This connecting rod 20, for purposes later set out, is made telescopic, being composed of two telescoping parts, one being a plunger 23 having an enlarged head 24 and held within the other member by a bushing 25, which is locked in place by the lock-nut 26 (see Fig.

The right 'hand vend of the lever 11 is lowered and raised so as to cause the worm 13 to engage or disengage its gear 16, which actions are brought about bythe following means:

27 is a post beneath the right hand end of the lever 11 and acts as a stop to limit its downward movement. 28 isa spring connected to said post and to the lever 11 and tending to depress the latter. l 29, 30, 31 and 32 are four loosely connected members of a lifting andreleasing frame, the first of which, 29, is fixed upon the shaft 33v journaled in bearings carried by the base as at 34. A spring 35 'connected at one end to a stationary abutment 36 and at the other end y to the lower frame-member 30 tends to raise the front side of the lifting and releasing frame. and holds the nosel 37 on the member 30 against a cam 38, which is lixedly mounted on the shaft 17 The front frame member 31 is provided with a paw] or tooth 39 which engages and disengages a projection 40 carried by the lever 11. Rigldly connected to the shaftf33 is a crank arm 41 which is operatively connected to a press plate 42 on the keyboard of the machine. A spring 29 normally. holds the lifting and; releasing frame in retracted position so that the mein4 vbei* 31 is held against the projection with the pawl 39 above or below it. j The operation of these parts is as follows: The spring 28 tends to draw the lever down.-

The spring 35, which is stronger, lifts the .the action of the spring 28 so as to bring the worm 13 into mesh with the gear 16.

The worm 13 is constantly running at high speed in a rdirection to drive the gear 16 counter-clockwise (Fig. 1) and the first action aftei engagement of theworm therewith is established is to cause thel worm 13 to move toward the right along its spline 13 until arrested by the collar 15 iiXed to the shaft 8. which stops the longitudinal movement of the worm, which then causes the gear 16 to revolve at a relatively low speed. As the gear 16 and its shaft revolve. the cam 38 revolves. drawing down the nose 37 and the member 31 connected thereto until the pawl 39 comes below the projection 40, there` upon the arm 31 is drawn rearwardly by the action of the spring 29. bringing the nose of the pawl 39 beneath the under surface of the projection 40. This happens before the high point of the cam 38 reaches the nose 37. As soon as the high point of the cam 38 passes the nose 37 so as to release it the latter rises under the influence of the spring 35, which also lifts the pawl 39 and through it the lever 11 and worm 13, causing the latter to disengage its gear 16 after the gear 16 has been driven one complete revolution. As soon as the worm 13 has been disengaged from the gear 16, the springs 14, which are attached to the worm 13, and the rim of the fixed collar 15. draw the worm 13 against the stem 15 of the fixed collar 15. Another operation of the press plate 42 results in the same cycle of movements. The complete revolution of the gear 16 causes the connecting rod 20 to make one complete reciprocation and moves the main shaft 4 in the same manner as it would be moved by the handle` at the end of its movement is not transmitted to the calculating mechanism. The telescoping of the part 23 within the forward part of the connecting rod permits the gear 16 to be driven at a higher rate than the normal return movement of the cranks 22, and also -permils the machine to be operated manually by thecrank 5 when the motor is at rest, without disturbing the power-driving parts. The member 32 is provided with an elongated slot 32 where itis pivoted to the inember 31 so to permit lost motion between said members.

In order to prevent the release of the lever 11 and consequent engagement of the worm 13 with its gear 16 when the total key is not fully actuated, I form a hook 43 on the total interlock 44, which hook engages a pin 45 on a lever fixed on the shaft 33 so as to prevent the turning of that shaft by the operation of the press plate 42 when the total interlock is not in proper position.

In order to control the motor by the handle, I provide an oscillating switch 46, which is in series with the motor 6, and connect thereto a lever 4T pivoted at 48, and to the lower end of which is connected a rod 49, which engages the shank of the handle A spring normally holds the rod 49 in forward position and hence normally holds the switch 46 in off7 position. The forward end of the rod 49 lies in proximity to a notch 51 on the handle shank. lVhen the handle is moved to its back position, as shown in Fig. 1, the notch 51 engages the end of the rod 49, forcing it backward until the switch 46 is thrown to on position, as shown in Fig. l. lVhen the handle 5 is raised to normal upright position the rod` 49 is released and the switch 46 is thrown to off position by the spring 50. The spring 50 also throws the switch 46 to off position if the handle 5 is removed.

The handle is held in position on the main shaft by a pawl consisting of a lever 52 pivoted on a plate 53, carried by the shaft 4. and provided with a headed stud 54 which passes through a slot in the pawl so as to hold it to resist lateral strain upon the lever 52. The lever is provided with a revoluble disk 55, which serves as a detent for thel handle. The plate 53 is provided with a projection 56. The shank of the handle is provided with a shoulder 57 which, when the handle is in normal position, engages the projection 56 so as to cause it and the main shaft to follow the forward movement of the handle. The handle is also provided with a short circumferential groovel .57 in which the disk lies when the handle is in normal position, preventing the handle from being pulled ofi" from the main shaft and also holding it in upright position when once moved to that position, but permitting it to be moved backward to the position A-tii tti shown in Fig. l. The shank of the handle also has a recess 58 which extends as far inward as the groove 57 and lies opposite the disk when the handle is in the position shown in Fig. l. rlhis permits the easy assembling and removal of the handle. rll"hus, the handle held in. the backward position (Fig. 1) is slipped on the main shaft 4f, the disk 55 lying within the notch 58.. When the handle is moved to upright position, the disk 5.5 rolls over into the groove 57 and holds the handle. The-handle is easily removed' by the reverse of these movements.

rlhe roller pawl 55 also yields when the handleis'quickly thrown back after being released `at they end of its forward movement in normal hand operation, so that the inertia of the handle as it `is quickly retracted does notimpart a shock or jar to the shaft 4 and the mechanism operated thereby.

As will be evident to those skilled in the art, my invention permits of various modifications without departing from the spirit thereof or the scope of the appended claims.

What l claim is:

1. In a motor drive for machines, the combination of a motor, a shaft operated thereby, a worm upon said shaft, a gear shaft, 'a gear thereon for said worm, said worm and gear being relatively movable toward and away from one another, manually controlled means for causing said worm ,and said gear to engage, and means for automatically disengaging said worm and gearafter a predetermined rotation of said gear shaft. I n

2. ln a motor drive for calculating machines, the -combination ofa high speed motor, a shaft operated`thereby, a worm yupon said shaft, a gear shaft, a gear thereon for saidworm, said worm and gear being rela-4' 'tively movable toward andaway from one another, manually controlled means for-causing said worm and said gear to engage, and means for automatically, aftera mined rotation` of said gear shaft sengaging said worm and gear one of said last two members having a yiel ing connectionwith, c l

. worm-from said gear a ter a predetermined its shaft. l

3..ln a motor drive for Acalculating ma-v chines, the 'combination of a high speedline-1 to a shaft operated thereby, a worm upon 'said shaft, a gear shaft,v a gear thereon forsaid worm, said worm and gear being rela-- tively movable, toward and away` from one another, manually controlled means for causing said worm and said gear to engage, and

i movement.

redeterchines, the combination of a high speed motor, a shaft operated thereby, a worm upon said shaft, a gear shaft, a gear thereon for said worm,l saidnworm and gear being relatively movable toward and away from one another, manually controlled means for causing said worm and said gear to engage, and means for automatically disengaging said Worml and gear after a predetermined rotation of said4 gear s haft, a crank pin moving with said gear shaft, a link connected thereto, and a crank actuated by said link.

5. In a motor drivefor calculating machines, the combination of a high speed motor, a transversely movable shaft operated thereby continuously at high speed, a worm upon said shaft, a gear for said worm, manually controlled means for moving said worm into engagement with said'I gear, and means for automatically vwithdrawing said worm from said gear after a predetermined movement of the gear shaft.

6. `In a motor `drive for calculating machines, the combination of a high speed yworm from said gear after a predetermined movement of the gear shaft, said worml being longitudinally movable on its shaft and yielding means for ,limiting its longitudinal 7. In a, motor drive for calculating machines, the combination of a high speed motor, a transversely movable shaft operated thereby continuously at high speed, a Worm upon said shaft, a gear for said worm, manual y controlled means for moving said worm into engagement with said gear, and means for automaticall withdrawing said movement of the gear shaft, said automatic means comprlslng a cam on the gear shaft,

shaftandengaged by said pawl when retracted by said cam, and a spring lifting said pawl'and lever, when free to act.

CHARLES WALES 

